Heating stove for closed rooms or the like



April 2,' 1946. D. CAUCHANER 2,397,470

HEATING STOVE FOR CLOSED ROOMS OR THE LIKE Filed Feb. 26, 1944 '5Shets-Sheetl .Lu.un nnmn-nun INVEN TOR.

April 1946- D. CAUCHANER 2,397,470

HEATING STOVE FOR CLOSED ROOMS OR THE LIKE 0/] W0 CHUCHANE/P a I 4 zINVENTOR.

p l 1946- D. CAUCHANER HEATING STOVE FOR CLOSED ROOMS OR THE LIKE FiledFeb. 26, 1944 3 Sheets-Sheet 5 INVENTOR. 04m) C/lUC/M/VE/F Patented Apr.2, 1946 UNITED OFFICE HEATING STOVE FOR CLOSED ROOMS OR THE LIKE DavidCauchaner, Buenos Aires, Argentina Application February 26, 1944, SerialN0. 524,108

2 Claims.

This invention relates to a heating stove for closed rooms or the like,and a main feature of the same consists in that there does not exist anyduct or other opening of communication between the furnace of the stoveand the room wherein the same is installed, with regard to which thestove is tightly closed.

In the heating devices known as fireplaces, the front part is completelyopen, so that the air required for combustionis withdrawn in a largeamount from the room where the same is placed, owing to which the coalor wood used as fuel will be consumed with considerable speed and in anirregular manner, on account of the continuous fluctuations in thedraft.

An important drawback of this type of heating systems consists in thatby their front opening an abundant radiation of heat takes place, whichdoes not allow of any person staying near the front of a fireplace owingto the high temperature caused by radiation on its impact with a surfaceof any kind, this being the main reason why the use of such fireplaceshas been excluded from small rooms.

A further deficiency is caused by the fact that the furnace is in directcommunication with the room to be heated, so that at the times when thedraft is reduced or even nil, as is frequently the case, the room isinvaded by smoke and combustion gases which are highly noxious tohealth.

The stove which forms the object of this invention is adapted foroperating in a built-in position as well as in the middle of a room, andby its use all the drawbacks above referred to are avoided, owing to thecompletely isolated arrangement of the furnace, for which purpose twodoors are provided, between which a suitable amount of air remainsenclosed which besides serving as a thermic isolating means, preventsthe overheating of the outer door, so that a person may approach thestove without risk of being submitted to an excessive heat. 7

The air intake is formed by the same duct or fiue used for the escape ofthe combustion gases, so that in said flue two opposed currents areformed, one, in a rising direction, by the smoke and combustion gases,and the other, in a descending direction, formed by the air forcombustion. The amount of descending air is rather small, owing to whichthe combustion in the furnace of the stove will be effected in a regularand slow manner, without formation of large flames, which allows ofassuring a suitable caloric yield from the fuel used; besides, thedescent of the air in counter-current causes an exchange of heat betweenthe latter and the combustion gases, which permits the use of thecalories which heretofore were lost with the combustion gases, so thatthe air will arrive at the furnace at a suitable high temperature whichfacilitates combustion. In this way a homogeneous heating of the wallsof the furnace is secured through which the heat is then transmitted tothe room, and as such heating and transmission is effected over asurface of considerable extension, the temperature of the radiatingsurfaces will not be raised to an excessive degree.

The stove in accordance with this invention is also provided with an ashpit arranged below the grate which forms the base of the furnace; this 1choke or hinder the combustionin the lower layers, causing the fire togo out as no grate was provided at the bottom of the stove.

.The ash pit, like the furnace, is tightly closed by means of a door anda grid, or by two doors,

section shown-in Fig. 3.

between which an air chamber is formed.

In order to facilitate the understanding of the details of thisinvention, a preferred embodiment of the same will now be described withreference to the accompanying sheets (if-drawings wherein:

Figure 1 illustrates a front view of a stove constructed inaccordance'with the features of this invention.

Figure 2 shows a section of the same stove, taken along a horizontalplane at the level of the furnace.-

Figure 3 is a longitudinal section of the stove.

Figure 4 shows a section of the same stove, taken along a vertical planeand normal to the Figure 5 illustrates 'a front view of part of one ofthe doors of the furnace, and

Figure 6 illustrates, in horizontal section, some details of the severaldoors for closing the furnace.

Similar letters of reference are used to indicate like or correspondingparts in all the views.

In the interior of a casing B of suitable shape and partially built-inin the wall of a room, are arranged two chambers, an upper one F whichforms the furnace, provided with an is an important advantage over;

arched ceiling, and a lower chamber L, of the shape of a rectangularparallelopiped, which serves as an ash pit. The two chambers areseparated one from. the other by the grate C, larranged at the level ofthe floor E of the room. From the back end and top of the chamber Fextends a draft channel or flue A, designed to serve at the same time asan intake duct for the air for combustion. The front partof the chamberF is provided with a rectangular opening adapted to be closed by threedoors, of which the outer one G only serves for a decorative purposevand may be constructed in the shape of a metal lic grid, of wrought ironor other suitable metal? 7 the door H of the middle establishes a tightc16 sure for the opening, while the inner door I may be provided withany suitable means for closing the'same, as its purpose is to protectthe door 1-1 against the direct heat radiated by combustion.

The chamber L is also provided at its front'end with a rectangularopening, adapted tobe tightly closed-by means of a door, and the cavityor recess formed in front of the same is closed by means of a seconddoor or :grid J, which, when in itsclosed position, is flush with andforms an extension of the floor E. a V

The opening of the chamber F is formed with several frames, arranged ina stepped relation. The inner frame l :is provided along its edgeadjacent to the chamber with a flange i, against which closes the door'I, mounted to swing on a vertical hinge pin d, said door-I beingprovided for handling the same with a handle or knob m. Against theouter part of said frame I is the door mounted to swing on a verticalhinge pin 22, secured to the frame 1; the door H isprovided on its outerside with a bar b, loosely connected to the hinge pin 11, and arrangedto extend through a clamp c, which allows :of a limited motion of thebarb in a vertical direction, of suflicient extent to enable the same toengage with the hook e, provided for that purpose on the frame Z. I Thebar b is for-med at the middle with athreaded opening, normal to theplaneoftthe door I-I, through which passes a screw, a -which by bearinOn its outer part, the opening of the chamber F is formed with anotherframe h, against which is the door G, formed by-a frameof metallic rodsg to which is secured a metallic-grid or the like. The door G swings ona spindle o and is provided with a suitable handle or the like,indicated at f.

From the foregoing description it will have' been understood that theparticular construction of the improved stove entirely avoids anypossible danger of fire, as well as of escape ofgases, which the stovesof known construction. v

The fire started in the furnace B will heat the walls B, the outer partsof which will transmit the heat to the air in contact therewith and thuscause the same to circulate through the entire room.

tails may be introduced without departing from the scope of theinvention, as set forth in the claiming clause hereunto annexed.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim and desire to secure by .LettersPatent is:

l. A heating stove comprising a furnace com- 7 partment and an ashcompartment, said furnace "1.5

compartment being located above the level of the ground surrounding saidstove, and said ash compartment'being located below said ground level,

embeddedin the ground; a free grid separating said furnace compartmentand said ash compartment and arranged at least substantially on the samelevel as the ground surrounding said stove; a feeding opening in saidfurnace compartment arranged above said ground level; an ash removingopening in said ash compartment arranged below said ground level; meansfor closing said feeding opening of said furnace compartment, said meansconsisting of at least two doors at least one of which tightly closessaid furnace compartment, said doors being arranged in such manner as toform an air chamberbetwee-n each other when closed; and means forclosing said ash removing opening of said ash compartment arranged atleast partly below said round level and consisting of a tightly closingdoor and a grid door arranged in such a manner as to form an air chamberbetween each other when closed.

2. A heating stove comprising a furnace compartment and an ashcompartment, said furnace compartment being located above the level ofthe ground surrounding said stove, and said ash compartment beinglocated below said ground level embedded in the ground; a free gridseparating said furnace compartment and said ash compartment andarranged at least substantially on the same level as the groundsurrounding said stove; a feeding opening in said furnace compartmentvarranged above said ground level; an ash removing opening in said ashcompartment arranged below said ground level; means for closing saidfeeding opening of said furnace compartment,

said means consisting of at least two doors at least one of whichtightly closes said furnace compartment, said doors being arranged insuch a manner as to form an air chamber between each other when closed;an open compartment in front of said ash compartment arranged below saidground-level;v a tightly closing door between said ash compartment andsaid open compartment; and a grid door for closing said opencompartment, the same thus serving as air chamber when said tightlyclosing ash door and said grid

